2(x+3)=5(x-1)-7(x-3)+2

解答

2 (x + 3) = 5 (x - 1) - 7 (x - 3) + 2

x = 3

求解步骤

2 (x + 3) = 5 (x - 1) - 7 (x - 3) + 2

展开

2 (x + 3) : 2 x + 6

展开

5 (x - 1) - 7 (x - 3) + 2 : - 2 x + 18

2 x + 6 = - 2 x + 18

将

6

到右边

2 x = - 2 x + 12

将

2 x

para o lado esquerdo

4 x = 12

两边除以

4

x = 3

so l v e f or x, v^{2} = v^{2} + 2 a x

7 - 18 x = 15 - 10 x - 9 + 5

2 (40 - 5 y) = 10 y + 5 (1 - y)

- 9.4 - (- 3 x - 1.8) = 5 (3 x + 1)

2.4 z + 1.2 z - 6.5 = 0.7